Kourtney Kardashian turned an LA car park into her own personal catwalk this week as she enjoyed a day out with eldest son Mason.

The Keeping Up With The Kardashians star, 37, flashed her impressively toned abs as she took treated son Mason, seven, to a day out in the California sunshine on Tuesday, jacket casually flung across one arm.

Mum of three Kourtney went for an unusual look that only a Kardashian could pull off, teaming high waisted baggy grey jogging bottoms with a white cropped t-shirt and grey bomber jacket, alongside those all important A-lister sunglasses.

(Image: Splash News)

The star's been working out hard lately (Image: Splash News)

Kourtney treated son Mason to a day out in LA (Image: Splash News)

The star has just returned to our screens with the launch of the 13th series of KUWTK, which kicked off last weekend.

It opened with an update on Kourtney's current status with ex Scott, the father of her sons Mason, Reign, two, and daughter Penelope, four.

The mum-of-three admitted she doesn't mind spending time with Scott when they're a family - but she can't stand being around him in social situations.

Kourt's flaunted her abs in a cropped tee (Image: Splash News)

"I really do enjoy hanging out with Scott and the kids because we know what we're doing," Kourt initially said in a confessional.

"When we’re out socially I just don’t know how to act.

"For so many years I’ve been used to playing a certain role and having to be responsible and watching out for his behaviour.

Kourtney Kardashian and Scott Disick take the kids to the beach in Miami (Image: Splash)

Kourtney is back on screens with the new series of KUWTK (Image: E!)

Scott and Kourtney split but remained close (Image: E!)

At the end of the episode, the pair appeared to iron out their differences after sitting down for a heart to heart.

"I think it’s more awkward in social environments. Day-to-day," said Scott.

"You and I are somewhat best friends every day but then when it goes into a social place neither of us really know how to act and it just becomes uncomfortable. Is there a solution to this?"

Kourtney replied: "I don’t want you to have to feel anxious or guilty. There was a time in our life when your actions would affect me. Now I'm older and realise with all the responsibility I have to take on - no offence to you - but no matter what you do I can’t change my life over it for the worse."

She also said she doesn't think they need to do stuff together "24/7".

"I was trying to give you your space to have your own fun on your own terms too," Scott replied.

"I guess we both need to do our thing without us being together. I feel like maybe there are times you want to run around with your girlfriends and don’t want your ex-boyfriend to be there."

To camera, Kourtney added: "I'm happy Scott is bringing this up. Communicating is something we’re not good at at together. I think it’s going to be a constant process to figure out how to live life parenting our kids, being a family but not being together."

Keeping Up With The Kardashians is available now in the UK & Ireland on hayu & 19th March at 9pm on E!